hunter



UNTTED STATES ATnNT Trier)..-

BEN \V. HUNTER, OF ASHINGTON, DISTRICT OF COLUMBIA, ASSIGNOR OF li Ol'R-FIFTITS TU (LEh'IEXT \V. llOlVARl), ()l? SAME PLACE.

PAVEMENT.

SPECIFICATION forming part of Letters Patent No. 399,045, dated March 1889.

Application filed March 23, 1888 Serial No. 268,281. (No speciinensd To (LZZ whom it may concern: the manufacture of my paving composition;

Be it known that 1, BEN HUNTER, of but I prefer to use paraffine oil or the resid- \\ashington, in the District of Columbia, uum thereof, and While the paraffine-oil is not have inventeda new and useful Improvement a fixed oil I have found by experiment that 5 5 in Pavements; and 1 do hereby declare that an alfinity is secured between parafiine, coalthe following is a full, clear, and exact detar, and asphalt bya mixture with rosin, and scription of the same. the paraffine by this mixture becomes a fixed My invention an improved composition of oil. matter designed principally for the pavement I am aware that a composition has been [O of streets; but it is applicable for use as sidemade for roofing purposes composed of aswalks and as a covering for the floors of buildphalt, coal-tar, and rosin, and I do not broadly ings. claim the use of these ingredients. I have My improved composition is prepared of found by experiment that the elements stated materials in proportion and in the manner are not fitted for use as a permanentcomposi- 5 5 hereinafter specified. I take of parafiine-oil, tion, for the reason that a pavement formed of or the residuum thereof, ten pounds; of comsuch a composition becomes very dry and men rosin, ten pounds; of coal-tar or panhard, and under the action of vehicles will pitch, the residuum of distilled coal-tar, Wear into fine particles, and that it neceseighty pounds, and of asphalt forty pounds, sary to unite with these elements a fixed or 20 and mix these thoroughly together. The comnon-drying oil. The cheapest of these oils, and mon rosin effects the desired union between the one I prefer to use, is paraffine-oil or the the oil and the tar, and the Whole forms an residuum thereof. Ordinarily this oil has no cxeeedin gly-sticky substance. This substance affinity for other ingredients; but I have found or some equivalent binding mixture or subthat by first mixing the oil with the rosin a 5 stance is required to combine properly the resulting product is obtained which has a other ingredients of my composition. Of this great affinity for the coal-tar and asphalt, and composition 1 take to formapavementtivolve the result is a pavement composition permaper cent. of sand or sand grits, eighty per nently oily and mini-drying,and therefore not cent. of comminuted fibrous rock or coarse asliable to break.

o bestus eight per cent, and these ingredients I claim I mix thoroughly to form a composition suit- A paving composition consisting of sand able for pavement. and grits, fibrous rock, a fixed oil, rosin, coal The fibrous rock mentioned above is formed tar, and asphalt, substantially in the proporof magnesia, silica, and iron and has a strong tious specified. 7 5 5 fiber. It is found in some parts of Virginia, In testimony whereoflhave signedmy name and it may be used in the place of asbestus. to this specificationinthc presence of twosub The fibrous rock in connection with the adscribing witnesses.

hesivo or sticky substance forms a strong 81*) \V. I IU NTER. bond for the sand or grit and constitutes a Vitnosses: 40 very hard and tough pavement or floor. THUS. .li. SHERMAX,

As above stated, I may use any fixed oil in, JOHN J. CHEW. 

